Existentialism Is a Humanism

Book Overview

Existentialism Is a Humanism is the published text of a lecture Jean-Paul Sartre delivered in Paris on October 29, 1945, at the Club Maintenant, and published the following year as L'existentialisme est un humanisme. It is not a systematic treatise. It is a defense, a clarification, and an act of public philosophy, written at the moment existentialism had become a sensation in postwar Paris and was being attacked from both the Catholic and the Marxist left. Its aim is to answer the accusation that existentialism is a philosophy of despair, quietism, and individualism, and to show that it is instead a philosophy of action, responsibility, and human dignity.

The lecture's argument is compact but influential. It begins with the formula that has become the slogan of the movement — existence precedes essence — and draws out its consequences for the human condition: because there is no pre-given human nature, each person must create a self through choices, and those choices bind everyone. Anguish, abandonment, and despair, which critics read as pessimism, are reinterpreted as the honest conditions of a freedom that has no excuses. The lecture closes by reclaiming the word "humanism": existentialism is a humanism because it places the human being at the center, restores the dignity of the individual, and reminds us that there is no legislator but ourselves.

The text is short, vivid, and accessible, which is precisely why it became one of the most widely read statements of existentialism — and also why Sartre later expressed reservations about it, calling it a simplification of his philosophy. It should be read, then, both as an introduction to existentialism and as a historical document in its own right.

Author Context

Jean-Paul Sartre (1905–1980) was the defining figure of French existentialism. By October 1945 he was already famous: Nausea (1938) had established him as a novelist; Being and Nothingness (1943), published under the German occupation, had established him as a philosopher; and the plays The Flies (1943) and No Exit (1944) had made him a public presence. The lecture consolidated this celebrity. Delivered to an overflow audience at the Club Maintenant, it was a performance as much as an argument — a philosopher answering his critics in front of the city that was making him famous.

The lecture draws on the technical philosophy of Being and Nothingness but translates it into ordinary language. The ontological vocabulary of being-in-itself and being-for-itself disappears; what remains is the claim that human beings are not things, that they are defined by their projects rather than by any fixed nature, and that freedom is not a luxury but a fate. Sartre's own life in these years — the Resistance, the experience of occupation, the postwar political engagement — supplied the lecture's urgent tone. For Sartre, the question of whether a philosophy of freedom could also be a philosophy of responsibility was not abstract; it had been tested in the recent history of France itself.

Historical Background

The lecture must be read against the intellectual battles of 1945. Existentialism had become fashionable, and fashion brought criticism. Catholic thinkers charged that a philosophy without God could only end in despair and moral chaos. Marxists charged that existentialism was a bourgeois ideology of the isolated individual, blind to history and class, a philosophy of quietism that left the world as it was. Sartre's lecture is a reply to both. Against the charge of despair, he argues that existentialism is an optimism, a doctrine of action. Against the charge of quietism, he argues that existentialism forces the individual to take responsibility. Against the charge of individualism, he argues that every choice involves all of humanity.

The broader setting matters too. Paris in 1945 was emerging from occupation, and the question of responsibility — who had collaborated, who had resisted, what a rebuilt France should be — was everywhere. Sartre's insistence that we are responsible not only for ourselves but for all people resonated with a society asking exactly that question. The lecture also marks the moment existentialism became a cultural movement rather than a philosophical school: within months, "existentialism" was a label applied to jazz, nightclubs, and fashion, much to Sartre's later annoyance. The text we read today is thus both a philosophical clarification and a snapshot of a historical moment.

Core Ideas

Existence Precedes Essence

Sartre's opening move is the formula "existence precedes essence." For an artifact such as a paper knife, the essence — what the knife is for — is conceived before the knife exists: the artisan has an idea of the object and its function, and the object is made to realize that idea. Human beings, Sartre argues, are not like paper knives. There is no divine artisan, no pre-existing human nature, no blueprint that says what a human being is supposed to be. A person exists first — is thrown into the world as a fact — and only then, through choices and actions, becomes something. We are not born with an essence; we make ourselves, and we keep making ourselves until death.

This single thesis does most of the philosophical work in the lecture. If there is no human nature, then there is no excuse: no heredity, no social role, no "character" that can be cited as the cause of what one has become. Conversely, there is no limit on human possibility except those set by freedom itself. Sartre draws the conclusion immediately: "Man is nothing else but what he makes of himself."

Freedom and Responsibility

From existence preceding essence, Sartre derives a radical conception of responsibility. Because there is no fixed nature, every act is a choice, and every choice is a choice of a value. To choose is implicitly to declare that the value one chooses is worth choosing — and since there is no external standard, the choice stands as a claim about how human beings ought to act. This is why Sartre says that in choosing for himself, a person chooses for all humanity. The choice of a career, a marriage, a political allegiance, or a way of life is at the same time an image of the kind of world one finds worth creating.

The weight of this responsibility is the source of what Sartre calls anguish. Anguish is not fear of an external danger; it is the felt awareness that one is the author of one's own values and that no one else can answer for them. The famous phrase — that man is condemned to be free — expresses the same point from the other side: freedom is not a reward we earn but a condition we cannot escape. We did not ask to be free, and we cannot stop being free. Even the refusal to choose is a choice.

Abandonment and Despair

Sartre next confronts the accusation that existentialism leaves us without grounds. "Abandonment" (forlornness) is the situation of the person who discovers that God does not exist, that there is no transcendent source of values, and that the famous phrase "if God does not exist, everything is permitted" is misleading: everything is permitted, but nothing is grounded, and this is precisely what makes responsibility possible. The existentialist does not conclude from the death of God that anything goes; he concludes that each person must invent values and must bear the anxiety of that invention.

"Despair," in the lecture's technical sense, is not hopelessness. It is the recognition that we can rely only on what is within our power, or within the probable cooperation of others. To act in despair is to act without the illusion of guaranteed outcomes. Sartre is careful to distinguish this from resignation: despair is the refusal of false hope, not the refusal of action. His favorite example is a soldier, whose freedom does not extend to whether the war ends, but who must act — and whose action matters — nonetheless.

Key Themes

The first theme is the rejection of determinism. Existentialism denies that human beings can be explained as the products of forces beyond their control; the self is a project, not a result. The second theme is the relation between freedom and situation: Sartre concedes that we are born into circumstances — a body, a class, a history — but insists that circumstances acquire meaning only through what we make of them. The third theme is intersubjectivity: because choices implicate everyone, freedom is not solipsistic. The fourth theme is the redefinition of humanism: the humanism Sartre defends is not the worship of humanity as an object of admiration, but the recognition that the human being is the source of values, "the being who is constantly transcending himself." The lecture's closing pages argue that this humanism is an optimism — a doctrine according to which destiny is in man's own hands.

Philosophical Meaning

The philosophical meaning of Existentialism Is a Humanism is twofold. Substantively, it is the most accessible statement of Sartre's ethics of freedom: the claim that values have no external foundation and that this lack of foundation, far from destroying morality, is the very condition of moral seriousness. Historically, it is the document that fixed the public image of existentialism and shaped how the movement was received for decades. The lecture is not without problems — Sartre himself later distanced himself from it, calling it a simplification that had been "devastating" for the reception of his work, and scholars have noted that its compressed arguments do not always match the subtleties of Being and Nothingness. But its significance is not merely popular. The lecture raises, in sharp and memorable form, the questions that define existentialist ethics: If we are radically free, what grounds our obligations? If there is no human essence, what does respect for persons require? If the universe offers no meaning, what can acting meaningfully mean?

Influence

No single text did more to spread existentialism beyond the seminar room. The lecture was reprinted, debated, and translated into dozens of languages; its phrase "existence precedes essence" became the most recognizable slogan in twentieth-century philosophy. It shaped the reception of existentialism in literature, theology, psychology, and political thought, and it fed directly into the postwar debates about humanism that engaged figures such as Maurice Merleau-Ponty, whose Humanism and Terror (1947) responded to the very ambiguities Sartre's lecture left unresolved. In the English-speaking world, the 1948 translation (and later scholarly editions) introduced generations of students to existentialism, and the text remains a standard point of entry to Sartre's thought. Its legacy is double-edged: it popularized a philosophy that Sartre himself later thought had been oversimplified, but it did so by demonstrating that philosophy could speak to a general public about the most urgent questions of human life.

Related Quotes

The lecture is the source of the two most famous formulas of Sartrean existentialism. The first — existence precedes essence — states the thesis that defines the movement. The second — that man is condemned to be free — states its consequence: freedom as inescapable responsibility. The lecture also contains Sartre's celebrated dictum that "man is nothing else but what he makes of himself" and his insistence that existentialism is an optimism and a doctrine of action. These formulations should be read alongside the fuller argument of Being and Nothingness and the fictional treatment of the same ideas in Nausea, where the experience of contingency receives its literary expression.

Sources

1. Jean-Paul Sartre, Existentialism Is a Humanism, trans. Carol Macomber (New Haven: Yale University Press, 2007). First delivered as a lecture in Paris, October 29, 1945; first published as L'existentialisme est un humanisme (Paris: Nagel, 1946). Quotations in this article follow this edition.
2. Stanford Encyclopedia of Philosophy, "Jean-Paul Sartre." Scholarly treatment of the lecture within Sartre's philosophy of freedom, responsibility, and ethics.
3. Wikipedia, "Existentialism Is a Humanism." Publication history and critical reception.
4. Encyclopaedia Britannica, "Existentialism." Overview of the movement the lecture defined for the general public.